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Direct imaging of the magnetic polarity and reversal mechanism in individual Fe3-xO4 nanoparticles

AuthorsMoya, Carlos; Iglesias-Freire, Óscar ; Pérez, Nicolás; Batlle, Xavier; Labarta, Amilcar; Asenjo Barahona, Agustina
Issue Date3-Apr-2015
PublisherRoyal Society of Chemistry (UK)
CitationNanoscale 7(19): 8110-8114 (2015)
AbstractThis work reports on the experimental characterization of the magnetic domain configurations in cubic, isolated Fe3-xO4 nanoparticles with a lateral size of 25-30 nm. The magnetic polarity at remanence of single domain ferrimagnetic Fe3-xO4 nanoparticles deposited onto a carbon-silicon wafer is observed by magnetic force microscopy. The orientations of these domains provide a direct observation of the magneto-crystalline easy axes in each individual nanoparticle. Furthermore, the change in the domain orientation with an external magnetic field gives evidence of particle magnetization reversal mediated by a coherent rotation process that is also theoretically predicted by micromagnetic calculations.
Publisher version (URL)http://doi.org/10.1039/C5NR00592B
Identifiersdoi: 10.1039/c5nr00592b
e-issn: 2040-3372
issn: 2040-3364
Appears in Collections:(ICMM) Artículos
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